Advertising, particularly advertising for junk food, is one area that is full of disagreements between what is accepted and disputed knowledge. Consider the ad below and how it uses knowledge of consumer behaviour (particularly male consumer behaviour) to persuade / manipulate. Even the use of Photoshop in advertising can be problematic. In the UK, for examples, there are rules about ad – visual ads that use too much editing (e.g. making a model seem extremely thin) can be banned.